/* Shared chrome for public subpages (nav, drawer, footer, page header) + rules page. */
.pubnav {
  position: sticky; top: 0; z-index: 100; height: var(--nav-h);
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 0 clamp(14px, 4vw, 40px);
  background: color-mix(in srgb, var(--bg) 74%, transparent);
  backdrop-filter: blur(16px) saturate(1.3); -webkit-backdrop-filter: blur(16px) saturate(1.3);
  border-bottom: 1px solid var(--border);
}
.pubnav .logo { display: flex; gap: 10px; align-items: center; color: var(--text); text-decoration: none !important; font-size: 15px; }
.pubnav .logo .wordmark { letter-spacing: .14em; }
.pubnav .links { display: flex; gap: 26px; }
.pubnav .links a {
  position: relative; color: var(--muted); font-weight: 600; font-size: 14px; padding: 4px 0;
  transition: color var(--t-micro) var(--ease);
}
.pubnav .links a::after {
  content: ""; position: absolute; left: 0; bottom: -2px; height: 2px; width: 0;
  background: var(--accent); transition: width var(--t-std) var(--ease);
}
.pubnav .links a:hover, .pubnav .links a.on { color: var(--text); text-decoration: none; }
.pubnav .links a:hover::after, .pubnav .links a.on::after { width: 100%; }
.menu-btn { display: none; }
.mobile-menu {
  position: fixed; top: 0; right: 0; bottom: 0; z-index: 150;
  width: min(330px, 85vw); background: var(--panel); border-left: 1px solid var(--border2);
  padding: 16px 22px 26px; overflow-y: auto; overscroll-behavior: contain;
  transform: translateX(100%); transition: transform var(--t-std) var(--ease);
  display: flex; flex-direction: column;
}
.mobile-menu.open { transform: none; }
.mobile-menu .mm-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }
.mobile-menu .mm-close { border: 1px solid var(--border); background: transparent; color: var(--text);
  width: 36px; height: 36px; border-radius: var(--radius-ctl); font-size: 16px; cursor: pointer; }
.mobile-menu a:not(.btn) {
  display: block; padding: 15px 4px; font-weight: 800; color: var(--text); font-size: 17px;
  border-bottom: 1px solid var(--border); font-stretch: 108%; text-transform: uppercase; letter-spacing: .02em;
}
.mobile-menu a:not(.btn):hover { color: var(--accent2); text-decoration: none; }
.mobile-menu .btn { margin-top: 18px; padding: 14px 20px; }
.mobile-menu .mm-foot { margin-top: auto; padding-top: 18px; }

/* carbon page header */
.pagehead {
  background: #0A0B0D; color: #EDEFF3; position: relative; overflow: hidden;
}
.pagehead::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(237, 239, 243, .035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(237, 239, 243, .035) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse 90% 100% at 40% 0%, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 90% 100% at 40% 0%, #000 30%, transparent 80%);
}
.pagehead::after {
  content: ""; position: absolute; top: -40%; right: -8%; width: 46%; height: 180%;
  background: radial-gradient(ellipse 46% 38% at 50% 50%, rgba(224, 27, 36, .15), transparent 70%);
  pointer-events: none;
}
.pagehead-inner { position: relative; z-index: 2; max-width: 1180px; margin: 0 auto; padding: clamp(40px, 6.4vw, 78px) clamp(16px, 4vw, 40px); }
.pagehead .kicker {
  display: inline-flex; align-items: center; gap: 10px; font-family: var(--font-mono);
  font-size: 11px; font-weight: 500; letter-spacing: .22em; text-transform: uppercase; color: #99A0AC; margin-bottom: 14px;
}
.pagehead .kicker::before { content: ""; width: 26px; height: 1px; background: #E01B24; box-shadow: 0 0 8px rgba(224, 27, 36, .8); }
.pagehead h1 {
  font-stretch: 116%; font-size: clamp(30px, 4.4vw, 54px); font-weight: 900;
  text-transform: uppercase; letter-spacing: -0.02em; line-height: .98; margin: 0;
}

/* page body layout */
.pagebody { max-width: 1180px; margin: 0 auto; padding: clamp(26px, 4vw, 48px) clamp(16px, 4vw, 40px); }
.rules-layout { display: grid; grid-template-columns: 250px 1fr; gap: 30px; align-items: start; }
/* grid items default to min-width:auto — the params table would otherwise force
   the whole layout wider than the viewport on mobile */
.rules-layout > * { min-width: 0; }
.toc { position: sticky; top: calc(var(--nav-h) + 16px); }
.toc .rules-search { margin-bottom: 14px; position: relative; }
.toc .rules-search svg {
  position: absolute; left: 12px; top: 50%; transform: translateY(-50%);
  width: 16px; height: 16px; color: var(--muted); pointer-events: none;
}
.toc .rules-search input { padding-left: 38px; font-size: 14px; }
.toc nav { display: flex; flex-direction: column; gap: 2px; }
.toc nav a {
  padding: 9px 13px; border-left: 2px solid var(--border); color: var(--muted);
  font-size: 13.5px; font-weight: 600; text-decoration: none !important;
  transition: color var(--t-micro) var(--ease), border-color var(--t-micro) var(--ease), background var(--t-micro) var(--ease);
}
.toc nav a:hover { color: var(--text); border-left-color: var(--border2); }
.toc nav a.on { color: var(--accent2); border-left-color: var(--accent); background: linear-gradient(90deg, var(--accent-soft), transparent 80%); }
.rules-content .rule-sec {
  scroll-margin-top: calc(var(--nav-h) + 16px);
  background: linear-gradient(180deg, rgba(255, 255, 255, .02), rgba(255, 255, 255, 0) 40%), var(--panel);
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px 26px; margin-bottom: 16px;
}
html[data-theme="light"] .rules-content .rule-sec { background: var(--panel); }
.rules-content .rule-sec h2 {
  font-size: 19px; font-weight: 800; margin: 0 0 10px; display: flex; align-items: center; gap: 10px;
}
.rules-content .rule-sec h2 .n { font-family: var(--font-mono); font-size: 13px; color: var(--accent2); }
.rules-content .rule-sec ul { padding-left: 20px; margin: 8px 0; }
.rules-content .rule-sec li { margin: 7px 0; }
.rules-content .rule-sec p { margin: 8px 0; }
.rules-content mark { background: var(--warn-soft); color: var(--warn); border-radius: 2px; padding: 0; }
.rules-empty { text-align: center; color: var(--muted); padding: 40px 0; }
.params-title { font-stretch: 112%; font-size: 19px; font-weight: 900; text-transform: uppercase; margin: 30px 0 8px; }
.params-pick { display: none; margin-bottom: 14px; }
.params-scroll.m { display: none; }
.params-scroll { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); background: var(--panel); margin-top: 12px; }
table.params { width: 100%; border-collapse: collapse; min-width: 560px; font-size: 14px; }
.params th, .params td { padding: 12px 15px; border-bottom: 1px solid var(--border); text-align: center; }
.params td:first-child, .params th:first-child { text-align: left; color: var(--muted); font-weight: 600; }
.params thead th {
  background: var(--bg2); font-family: var(--font-mono); font-size: 11px; font-weight: 500;
  letter-spacing: .1em; text-transform: uppercase; color: var(--muted);
}
.params tbody tr:last-child td { border-bottom: none; }
.params td.v { font-family: var(--font-mono); font-weight: 600; }

@media (max-width: 900px) {
  /* params table: dropdown picks one model on mobile */
  .params-pick { display: flex; }
  .params-scroll.d { display: none; }
  .params-scroll.m { display: block; }
  .params-scroll.m .params { min-width: 0; }
  .pubnav .links, .pubnav .nav-cta { display: none; }
  .menu-btn { display: inline-flex; align-items: center; justify-content: center;
    width: 38px; height: 38px; border: 1px solid var(--border); border-radius: var(--radius-ctl);
    background: transparent; color: var(--text); font-size: 17px; cursor: pointer; }
  .rules-layout { grid-template-columns: 1fr; }
  .toc { position: static; }
  .toc nav { flex-direction: row; flex-wrap: wrap; gap: 8px; }
  .toc nav a { border: 1px solid var(--border); border-radius: 6px; padding: 6px 13px; font-size: 12.5px; background: var(--panel); }
  .toc nav a.on { border-color: var(--accent); }
}

/* multi-column footer (synced with the home page) */
footer { border-top: 1px solid var(--border); background: var(--bg); padding: 52px clamp(16px, 4vw, 40px) 34px; margin-top: 40px; }
footer .inner {
  max-width: 1180px; margin: 0 auto; display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 30px; align-items: start;
}
footer .logo { display: flex; gap: 10px; align-items: center; font-size: 15px; text-decoration: none !important; }
footer .logo .wordmark { letter-spacing: .14em; }
footer .fcol .ft { font-family: var(--font-mono); font-size: 10.5px; font-weight: 500; text-transform: uppercase; letter-spacing: .16em; color: var(--muted); margin-bottom: 14px; }
footer .fcol a { display: block; color: var(--text); font-weight: 600; font-size: 14px; padding: 5px 0; }
footer .fcol a:hover { color: var(--accent2); text-decoration: none; }
footer .fbrand p { color: var(--muted); font-size: 13px; margin: 14px 0 0; max-width: 280px; }
footer .disc { font-size: 12px; color: var(--muted); max-width: 1180px; margin: 30px auto 0; line-height: 1.6; border-top: 1px solid var(--border); padding-top: 18px; }
@media (max-width: 760px) { footer .inner { grid-template-columns: 1fr 1fr; } footer .fbrand { grid-column: 1 / -1; } }